mfllleb



B. MULLER. SMOKE CONSUMING FURNAGB.

2 Sheets-Sheet 1.

(No Model.)

Patented Mar. 8.. 1892.

2 R. E L L M B.

SMOKE UONSUMING FURNAGB.

2. m .n w ...MA/wm, l@ w l 4 l, um u QUI: 5 l, l ,.5 M k. m m t. l n. J n.w a a 5 c 5 .L O W 5, f N WM nw m .Dr N NM@ Y .u W

me noms varias ca., maremma., wAsHmuwN. u. n.

UNITED STATES PATENT EEICE.

BERNHARD MLLER, OF CHEMNITZ, GERMANY.

ySIVIOKE-CONSUIVIING FURNACE.

SEECIFICATION forming part of Letters Patent No. 470,501, dated March 8, 1892.

Application iiled August 22, 1889. Serial No. 321.686. (No model.) Patented in England January 2, 1889, No. 70, and in Germany December 4, 1889. No. 48,890.

:To all whom t may concern: y. Y

Be it known that I, BERNHARD MLLER, of Chemnitain the Kingdom of Saxony and German Empire, have invented a new and use ful or Improved Smoke-Consuming Fire Device for Boilers, of which the following is a specification, reference being had therein to the accompanying drawings.

The invention relates to furnaces for various purposes, and is designed to effect the entire combustion of carbon which at present is wasted in the form of smoke, and thus to effect greater economy in heating and to avoid contamination of the atmosphere.

In order that my invention may be better understood, I now proceed to describe the same in relation to the accompanyingdrawings, reference being had to the letters and figures marked thereon.

This invention was patented in England January 2, 1889, No. 70, and in Germany December 4, 1889, No. 48,890.

Figure 1 is a sectional plan view of the furnace on line ma; of Fig. 2. Fig. 2 is a sectional view on line y y of Fig. l. Fig. 3 is a view of a longitudinal section on line a ,e of Fig. 1.

The arrangement shown in the drawings contains six furnaces; but I may use only one or any other number, and they may be arranged around the boiler in an oval or circular or other suitable form. All furnace-spaces are partially filled with porous brick in the form of bricks cl2, placed beside and above one another and at suitable distances from one another, so that the flames may pass or envelop and heat them to a high degree. lVhen the smoke developed by the fuel comes iu contact with these glowing fire-bricks cl2 and the same fine carbon particles constituting the smoke are rendered incandescent and are -partly consumed, while the products of combustion-such as carbon acids Vand carbonio oxide-enter the chimney lwithout any smoke. The furnaces 1 to 6 are supplied with furnacedoors ce a2 da, dac., and smoke tubes or channels b b2 b3, which can be regulated lby. the slide b, and further with valves c', nc.

fis the common iiue, which connects the several furnaces to the chimney.

The slide b allows of each furnace being connected to or disconnected from each other i t. t

atpleasure. The working of this arrangement is effected as follows: The furnaces are started in the usual manner, and when the slide b is placed as in the drawings-i e., between the fire-boxes 1 and -the doorl a and the valve c are left open to produce rapid circulation of air until the fire-bricks in the furnaces are brought to a glowing heat. The valves c to c6 regulate the draft of gases in the smoke-channels b to be, while the slide b separates or connects, respectively, the fireplaces 1 to 6, according into which of the recesses that slide is inserted. The door a is closed and the firing is continued through the Opening d, arranged on the top and which may be closed hermetically, the air being admitted through openings of any suitable description arranged on the fire-doors. The fuel, of `not more than nut size, is fed among the glowing fire-bricks in small quantities and at short intervals through the tubes d. When the firebricks in one furnace have been brought to white heat, the next furnace is proceeded with, and soon until all are in working order. It is evident that a greater or less number of furnaces may be worked at pleasure. arrangement is more economical than theordinary fire-grate arrangement, when the whole grate must be covered with fuel, thus rendering regulation more difficult. The combustion of the fuel, which consists of coal of any kind, is effect-ed completely without smoke and without the formation of cinder, only light ashes being formed, which are taken to the common flue, where they can be easily removed. 'When the fire-bricks of the furnaces a 5, dac., have been brought to a strong glowing heat, the res in l, 2, and 3 may be slackened,while the admission of air through the respective furnace doors or openings in said furnace-doors is continued, the air arriving at the tire-place strongly heated. When the fireebricks in the discontinuedfurnace or furnaces have become cold, the air is allowed to enter through the next furnace-door, while This y roo and inserted between l and 2, the valve c and the furnace-door ct are closed, While the valve c3 is opened, when all furnaces will be again in working order. In the above-described manner the other furnaces 2 3 4, &c., may also .be discontinued by openingon the adjoiningfurnaces 3 4 5, &c.,the furnace-doors a3 a4 a5, &c. In restarting, the valve b is advanced one or more furnaces (according to the number discontinued) between the furnaces 2 and 3, 3 and. 4, 4 and 5, dac. The open furnacedoors a2 a3 a4, &c., and the valves of the dis- 5 continued furnaces 2 3 4, &c., are closed, ex-

cept the door through which the air is admitted to the fire. At the same time the valve in the smoke-Hue nearest the valve or slide l) must be closed. According to the size of the arrangement, such change in working the furnaces may be effected every ten or iifteen hours. When the Working is to be interrupted, the open furnace-door through Which air is admitted is closed, as Well as the valve of the open smoke-line, which is connected to the furnace at Work and the chimney. The fire then does not burn further, While the heat is maintained for days.

I claim as my invention- 1. In combination,the iine-fuel-lourningg,` furnace having the fire-spaces with the dooropenings and the openings d and the firebricks arranged Within the lire-space, substantially as described.

2. In combination, the series of tine-fuelburning furnaces, each having a door-opening, a fiuef, common to all the furnaces, the channels leading from the several furnaces into said Iiue and having valves, and the slide l), arranged to connect or disconnect the furnaces, substantially as described.

In Witness whereof I have hereunto set my hand in presence of two Witnesses.

BERNHARD MLLER.

Witnesses;

W. B. MURPHY, HERNANDO DE Soro. 

